Subversion Repositories Applications.papyrus

/*
 * FCKeditor - The text editor for internet
 * Copyright (C) 2003-2005 Frederico Caldeira Knabben
 * 
 * Licensed under the terms of the GNU Lesser General Public License:
 *              http://www.opensource.org/licenses/lgpl-license.php
 * 
 * For further information visit:
 *              http://www.fckeditor.net/
 * 
 * File Name: fckscriptloader.js
 *      Defines the FCKScriptLoader object that is used to dynamically load
 *      scripts in the editor.
 * 
 * File Authors:
 *              Frederico Caldeira Knabben (fredck@fckeditor.net)
 */

// This object is used to download scripts and css files sequentialy.
// A file download is not started until the previous file was not completelly
// downloaded.
var FCKScriptLoader = new Object() ;
FCKScriptLoader.IsLoading = false ;
FCKScriptLoader.Queue = new Array() ;

// Adds a script or css to the queue.
FCKScriptLoader.AddScript = function( scriptPath )
{
        FCKScriptLoader.Queue[ FCKScriptLoader.Queue.length ] = scriptPath ;
        
        if ( !this.IsLoading )
                this.CheckQueue() ;
}

// Checks the queue to see if there is something to load.
// This function should not be called by code. It's a internal function
// that's called recursively.
FCKScriptLoader.CheckQueue = function() 
{
        // Check if the queue is not empty.
        if ( this.Queue.length > 0 )
        {
                this.IsLoading = true ;
                
                // Get the first item in the queue
                var sScriptPath = this.Queue[0] ;
                
                // Removes the first item from the queue
                var oTempArray = new Array() ;
                for ( i = 1 ; i < this.Queue.length ; i++ )
                        oTempArray[ i - 1 ] = this.Queue[ i ] ;
                this.Queue = oTempArray ;
                
                this.LoadFile( sScriptPath ) ;
        }
        else
        {
                this.IsLoading = false ;
                
                // Call the "OnEmpty" event.
                if ( this.OnEmpty ) 
                        this.OnEmpty() ;
        }
}

if ( FCKBrowserInfo.IsSafari )
{
        FCKScriptLoader.LoadFile = function( filePath ) 
        {
                if ( filePath.lastIndexOf( '.css' ) > 0 )
                {
                        this.CheckQueue() ;
                        return ;
                }
                
                var oXmlRequest = new XMLHttpRequest() ;
                
                // Load the script synchronously.
                oXmlRequest.open( "GET", filePath, false ) ;
                oXmlRequest.send( null ) ;
                
                // Evaluate the script.
                if ( oXmlRequest.status == 200 )
                {
                        try
                        {
                                eval( oXmlRequest.responseText ) ;
                        }
                        catch ( e )
                        {
                                alert( 'Error parsing ' + filePath + ': ' + e.message ) ;
                        }
                }
                else
                        alert( 'Error loading ' + filePath ) ;
                        
                this.CheckQueue() ;
        }
}
else
{
        FCKScriptLoader.LoadFile = function( filePath ) 
        {
                //window.status = ( 'Loading ' + filePath + '...' ) ;

                // Dynamically load the file (it can be a CSS or a JS)
                var e ;
                
                // If is a CSS
                if ( filePath.lastIndexOf( '.css' ) > 0 )
                {
                        e = document.createElement( 'LINK' ) ;
                        e.rel   = 'stylesheet' ;
                        e.type  = 'text/css' ;
                }
                // It is a JS
                else
                {
                        e = document.createElement( "script" ) ;
                                e.type  = "text/javascript" ;
                }
                
                // Add the new object to the HEAD.
                document.getElementsByTagName("head")[0].appendChild( e ) ; 

                // Start downloading it.
                if ( e.tagName == 'LINK' )
                {
                        // IE must wait for the file to be downloaded.
                        if ( FCKBrowserInfo.IsIE )
                                e.onload = FCKScriptLoader_OnLoad ;
                        // Gecko doens't fire any event when the CSS is loaded, so we 
                        // can't wait for it.
                        else
                                FCKScriptLoader.CheckQueue() ;
                                
                        e.href = filePath ;
                }
                else
                {
                        // Gecko fires the "onload" event and IE fires "onreadystatechange"
                        e.onload = e.onreadystatechange = FCKScriptLoader_OnLoad ;
                        e.src = filePath ;
                }
        }

        function FCKScriptLoader_OnLoad()
        {
                // Gecko doesn't have a "readyState" property
                if ( this.tagName == 'LINK' || !this.readyState || this.readyState == 'loaded' )
                        // Load the next script available in the queue
                        FCKScriptLoader.CheckQueue() ;
        }
}